1.

General description

The SSL5021BTS is a highly integrated, high-precision, non-isolated MOSFET/bipolar

buck controller. It is intended to drive LED lamps in universal mains non-dimmable lighting

applications up to 25 W. The SSL5021BTS is designed for low-ripple applications.

The SSL5021BTS operates in Boundary Conduction Mode (BCM) with on-time regulation.

Operating in BCM provides a constant output current control with high accuracy. Adaptive

switching frequency gives freedom to choose the inductor, which enables the optimization

of inductor size, efficiency and EMI.

The SSL5021BTS starts up and operates in switching mode directly from an external

allows a low-cost off-the-shelf inductor to be used, providing flexibility in application

design.

The SSL5021BTS comes in a compact TSOP6 package.

The SSL5031BTS is suitable for high power factor/Low-THD applications with a

high-temperature foldback function. The SSL5031CTS is best for high power

factor/low-THD applications without a high-temperature foldback function.

2.

Features and benefits

single layer Printed-Circuit Board (PCB) footprint

A)

SSL5021BTS

Compact low-ripple buck LED driver IC

Rev. 2 — 11 March 2015

Product data sheet